river, sergio quintana is live in napa. sergio? reporter: well, the rains have already caused some problems around town near napa, and the flood warning for the napa river has been extended through the weekend. tomorrow afternoon is when the napa river is supposed to be at its highest point. >> rain soaked trees are the first to cause problems on this stretch of redwood road. two trees came down and took out a powerline, knocking out electricity for 50 pg&e customers. the closed road also turned what usually be a five five minute de through the neighborhood into a 45 minute detour and caused concerns about nearby creeks and rivers. >> i was worried it wased inning here. >> some of his neighbors have put up small dikes in their front yard just to case. >> the creek will pop out up the street first and run down the street, and then the water is looking to get back in the creek so what the neighbors do is dike up the front ofÑç the yards to keep the water from coming in. >> at this city sand bag station, rob and some friends